Customer reviews from Filterbuy
Filterbuy - 18x36x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (5-Pack) - Gold
Average customer rating
4
(1,169 Reviews)
Rating breakdown 1,169 reviews
5 Stars
677
4 Stars
150
3 Stars
121
2 Stars
92
1 Star
129
Customer Reviews for Filterbuy - 18x36x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (5-Pack) - Gold
Customer Rating
1
Did not fit
on April 7, 2026
Posted by: Customer
It was the way my ac is made but I could not use it because it didn't fit.
Written by a customer while visiting Filterbuy
Customer Rating
5
I had trouble finding this
on April 6, 2026
Posted by: Customer
I had trouble finding this size at stores. With the subscription program I don’t have to worry
Written by a customer while visiting Filterbuy
Customer Rating
1
autoship
on April 4, 2026
Posted by: Customer
I am very unhappy with filterbuy as I keep trying to get off of autoship and it has been an impossible task, i would not recommend it to anyone
Written by a customer while visiting Filterbuy
Customer Rating
5
unfortunately, I had to return
on April 1, 2026
Posted by: Customer
unfortunately, I had to return the filters as they would not fit my opening
Written by a customer while visiting Filterbuy
Customer Rating
1
16x25x4 filters
on April 1, 2026
Posted by: Customer
Filters were smaller and don’t fit in furnace without air going around it. Big waste of money
Written by a customer while visiting Filterbuy
Customer Rating
5
I have received the item
on April 1, 2026
Posted by: Customer
I have received the item which been ordered.
Quality is perfect.
Quality is perfect.
Written by a customer while visiting Filterbuy
Customer Rating
4
Good
on March 30, 2026
Posted by: Customer
My fault for not reading the specific measurements, the "4" isn't actually 4 inches. its like 3. 7 or something. Maybe I was born yesterday and this is normal for filter sizing, but it does not fit like the 20x20x4 Honeywell filter that my HVAC people put in when our furnace was replaced a few months ago.
Written by a customer while visiting Filterbuy
Customer Rating
5
Same great filter, repeat customer ×4 or 5?
on March 26, 2026
Posted by: Customer
I feel like im in The Stanley Parable Delux edition. .
I always order this filter. I always give it 5 stars. Why keep blowing up my mailbox begging for a Review? Obviously if im a repeat customer is love the product.
I always order this filter. I always give it 5 stars. Why keep blowing up my mailbox begging for a Review? Obviously if im a repeat customer is love the product.
Written by a customer while visiting Filterbuy